C 400 C 400 N C 400 Z

C 400, C 400 N, C 400 Z 21/2”-10”

Modification Overview Ø Production began in 2000 under the Hunter name. Ø In 2002 it was produced as the Ames Colt (C) Series.

Check Cover Removal 21/2”-6” Cover slides back and is o-ring sealed. Ø Remove test cock # 3 from the body. Ø Insert a screwdriver through the hole on top of the cover sleeve. Ø Using both hands, rotate the cover ¼ turn clockwise and counter-clockwise to break o-ring seal. Ø

Check Cover Removal 21/2”-6” Slowly slide the cover sleeve to the downstream side of the housing. Ø Once fully pulled back, turn the sleeve 90 degrees. Ø

Check Valve Removal 21/2”-6” Modules are o-ring sealed. Ø Remove the check retainer. Ø Remove check 1 first, then check 2. Ø Using a flat blade screwdriver, gently pry the module out of the body. Ø

Check Cover Removal 8”-10” Ø For the 8 -10” sizes, remove both Victaulic couplers. Ø Remove test cock # 3 from the body. Ø Slide the cover downstream.

Check Valve Removal 8”-10” Modules are o-ring sealed. Ø Remove the 3 check retainers. Ø Remove check 1 first, then check 2. Ø Using a flat blade screwdriver, gently pry the module out of the body. Ø

Check Seat Removal The check seat is part of the module. Ø If seat is damaged, the entire module will have to be replaced. Ø

Check Disc Replacement 21/2”-4” The check modules are spring loaded. Ø Insert a screwdriver through the hole in the linkage and let it rest in the arbors on the module. Ø Remove the “E”-clip and pin connecting the linkage. Ø The clapper will open with no tension. Ø

Check Disc Replacement 21/2”-4” Remove the screws on the disc retainer. Ø Once disc is replaced, reassemble in reverse order. Ø Do not remove the spring assembly. Ø

Check Disc Replacement 6”-10” Locate the service hole on the side of the check module. Ø Use a ½”-13 x 5 fully threaded bolt. Ø Thread the bolt until the hole in the linkage is aligned with the notches in the spring arbors. Ø Insert a long phillips screwdriver through the hole and arbors. Ø

Check Disc Replacement 6”-10” Back the bolt out until the spring tension is transferred to the screwdriver. Ø Remove retaining clip and pin from linkage. Ø Spring assembly can be removed from the module. Ø Remove screws from disc retainer. Ø

Check Valve Reassembly Notes Ø Reassemble check valves in reverse order. Ø Apply lubricant to o-rings. Ø Replace check 2 first, then check 1.

Relief Valve Removal Relief valve is threaded onto body and o-ring sealed. Ø Disconnect sensing line hose. Ø RV should be removed by hand. Ø

RV Disassembly Remove the cover plate by removing the 4 allen screws. Ø Remove the diaphragm. Ø

RV Disassembly With the threaded end facing up, push up on the piston until the piston shaft with the attached E-clip is exposed. Ø Remove the E-clip. Ø

RV Disc Replacement Ø The RV disc is molded onto the disc holder and must be replaced as one piece.

RV Diaphragm Replacement Reassemble relief valve in reverse order Ø Form the diaphragm to fit over the disc holder. Ø Reinstall the diaphragm into the body. Ø

RV Reassembly Notes Ø Lubricate the RV body o-ring. Ø Reattach the complete RV to the assembly body.